Keeprite NG furnace code "fail to ignite"

4spdragtop said

I am NOT sure why the initial "no start", but the bride mentioned this was 1st fire up of the season. So that is new info. This last attempt, I closed the manual valve and reopened it. It was in open position.
Turning the control valve off/on a few times maybe helped with the *** kicking...

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We run into this on commercial buildings quite often, and it takes a while for the Techs to switch their brain over into the heating mode in the Fall and recall that the gas line(s) may be low on gas pressure, or have some air in them. Once they remember this (need to purge on rooftop units), the No Heat calls tend to go down.

This could be nothing more than your gas regulator has taken a "set" over the summer, and it's gotten used to supplying "x" amount of gas for the stove, water heater, or whatever. Now that you want "comfort" (furnace) heat again, it has to adjust (open) more, and as we all know, it gets harder to move the older you get.

Regardless, you'll remember this next year, right?